.denglu {
    position: absolute;
    display: flex;
    justify-content: center;
    left: 0;
    right: 0;
    top: 200px;
    margin: auto;
    bottom: 0;
    color: black;
    font-size: 20px;
    font-weight: bold;
}
.beizhu{
    color: #B22222;
    font-size: 15px;
}